Convert String to Decimal and and vice versa,

[DQUY05]

I want to convert QString sValue = "A"; to Decimal = 65, and vice versa Decimal = 81, then QString = "Q"

    QString sValue = "A";   
    bool bStatus = false;
    int nHex = sValue.toInt(&bStatus, 10);   
    ui->info_2->setText(QString::number(nHex));  // Always return = 0

Can someone help me
Thanks !

[J.Hilk]

@DQUY05 said in Convert String to Decimal and and vice versa,:

10

16, not 10, your string is supposed to be hex interpreted, so 16

[DQUY05]

@J-Hilk , thank Sir !
I want to convert to Decimal not Hex, as you said that is not what I want

   QString sValue = "A";   
    bool bStatus = false;
    int out = sValue.toInt(&bStatus, 16);   
    ui->info_2->setText(QString::number(out));  // Always return = 10, I need it = 65, no need it = 10

Thanks !

[Pl45m4]

@DQUY05

So basically ASCII to Int conversion?!

Have a look at

• https://doc.qt.io/qt-6/qstring.html#toLatin1

[J.Hilk]

@DQUY05
@Pl45m4 take a look at toLatin1() it should make your life easier, as long as you're sure your chars are ASCII chars.

If not, take the later of your string (e.g.at(0)) as a QChar and call unicode() on it

[DQUY05]

@J-Hilk Dear Sir !
As you said, I converted right

    QString sValue = "A";
    QChar out =  sValue.at(0);
    ui->info_2->setText(QString::number(out.unicode(),10));  // return = 65 => OK

I still don't know how to do the opposite, something like this

int value=65;
ui->info_2->setText(QString::fromUcs4(value));  // I need return = "A"

Thanks !

[J.Hilk]

@DQUY05 said in Convert String to Decimal and and vice versa,:

I still don't know how to do the opposite,

int value=65;
ui->info_2->setText(QString{QChar{value}}); 

[DQUY05]

@J-Hilk Yes, So great, Thank Sir !